Hydraulic jig



C. s. NAWMAN HYDRAULIC JIG April 5, 1949.

s She'etsSheet 1 Filed Oct. 17, 1945 INVENTOR, COLE 5. NAWMAN A T TORNE K April 5, 1949. 'c. s. NAWMAN HYDRAULIC J IG 3 Sheets-Shes t 2 Filed Oct. 17, 1945 lnn I N V EN TOR, COLE s. NAWMA 1v.

ATTORNEY.

April- 1949- c s. NAWMAN 2,466,120

HYDRAULIC JIG Filed Oct. 17, 1945 s Sheets-Sheet 3 I 0000600 /;2 0000000 4 00000000 000000000 000000000 30 00000000 000000000 000000000 ooooooooo 000 00 0 INVENTOR 000 00 000000 COLE S. NAWMAN.

A TTOPNE).

Patented Apr. 5, 1949 HYDRAULIC JIG Cole S. Nawman, Los Gatos, Calif., assignor of one-eighth to Adelbert Schapp, San Francisco,

Calif.

Application October 1'7, 1945, Serial No. 622,835

Claims.

The present invention relates to improvements in jigs, and has particular reference to an bydraulic jig in which a bed of sand flowing over a screen is subjected to the action of water passing through the screen from below in periodic impulses for classifying the sands.

The principal object of my invention is to provide a jig of the character described that is eflicient and economic in operation, easy to assemble and adaptable for installation under varying conditions which heretofore have usually called for special arrangements.

More particularly it is proposed to provide a jig in which the variable factors are under perfect control and in which various control elements may be readily adjusted to respond to varying conditions, differences in the character of the material treated, and differences in results desired.

One of the more specific objects of my invention is to arrange the jig in such a manner that it may be readily installed with respect to the flow of material to receive the flow from any one of four directions.

Another object of the invention is to arrange the feed launder and the discharge launder with respect to the bed of sand on the screen in such a manner that either launder may be adjusted for controlling the speed of flow across the screen and the thickness of the bed of material on the screen.

A further object of the invention is to provide means for adjusting the length of the stroke with which periodic impulses of water are forced through the bed of sands passing over the screen and to arrange the adjustments in such a manner that they may be made while the machine is in operation and while the operator has an opportunity to watch the result of the adjustment.

A still further object of the invention is to arrange the impulse motor in such a way that the down draft impulses may be eliminated altogether or may be regulated in intensity to bear a desired relation to the upward impulses.

It is further proposed to provide, underneath the screen, a directionalizing plate for eliminating turbulence in the water and for directing the surges of water uniformly over the entire screen area.

It is still further proposed to arrange the impulse motor or chamber as a separate unit from the remainder of the jig, which allows a single impulse chamber to serve a plurality of jigs, or a main jig and an auxiliary jig used for reclassifying the concentrates of the main jig in a closed circuit.

And finally, I propose to provide, in the feed launder, a transverse channel to serve as a slug and nugget catch and to boil and level off the water prior to its entry upon the screen.

Further objects and advantages of my invention will appear as the specification proceeds, and the novel and useful features of my jig will be fully defined in the claims attached hereto.

The preferred form of my invention is illustrated in the accompanying drawing, forming part of this application, in which:

Figure 1 shows a plan view of my jig;

Figure 2, a transverse vertical section taken along line 22 of Figure 1;

Figure 3, a section taken along line 33 of Figure 2;

Figure 4, a section taken along line 4& of Figure 1;

Figure 5, a longitudinal vertical section taken along line 55 of Figure 1;

Figure 6, a longitudinal section taken along line G5 of Figure 2; and

Figure '7, a section taken along line 'l-l of Figure 4.

While I have shown only the preferred form of my invention, it should be understood that various changes or modifications may be made within the scope of the claims hereto attached without departing from the spirit of the invention.

Referring to the drawings in detail, my jig may be supported on any suitable frame I, here shown as comprising four upright angle irons 2 arranged in the four corners of a square and suitably braced by horizontal members 3 forming girders about the frame.

In the upper end of the frame is supported a hopper 4 having four sides and being tapered from top to bottom. The lower end of the hopper terminates in a discharge spout 5 controlled by a suitable gate 6. The large open end of the hopper is formed with a horizontal flange 3 adapted to receive the screen 8 thereon.

The upper end of the hopper is square in shape and the screen is clamped to the flange l by means of the basket 9 superimposed upon the flange. The basket is also square in form and is arranged in such a manner that it may be secured upon the flange in any one of four different positions so as to take the flow of material from any one of four directions.

The basket comprises two side walls or plates l0 having horizontal bottom flanges ll fitting on the side flanges of the hopper and adapted to be secured thereto by means of four bolts l2. The side walls also have outwardly extending end flanges l3 formed with vertical slots M which are used as attaching means for the launders to be described hereinafter.

The side walls, which extend to a considerable height above the screen, are interconnected, at the front and rear ends of the screen, by transverse aprons |'5 which extend downwardly through a considerable distance to serve as abutments for the launders, and which extend a slight distance above the screen, as at 6, to establish a minimum depth for the bed of sand on the screen.

The bolt holes in the four flanges I of the hopper receiving the bolts I2 are evenly spaced in all four flanges, so that the basket structure thus far described may be clamped upon the screen and two opposing flanges in any one of four possible positions.

At the remaining two flanges of the hopper, the screen is anchored to the flanges by means of short angle irons I1 and bolts IS, the spacing between the latter corresponding to that between the bolts l2.

The screen may have a number of spaced cleats 8' mounted thereon to agitate the water, catch fines, and retain shot usually employed in devices of this character.

The feed launder 2D is adjustably secured upon the flanges l3 by means of bolts 2| passing through slots I4 so that the bottom of the launder may be raised and lowered with respect to the screen. The height of the launder affects the speed with which the water and the sands flow over the screen. The launder is preferably provided with a downwardly extending apron 22 bearing against the front apron and secured thereto by bolts 23 which are adjustable in slots in one of the aprons.

The feed launder is provided with a crosschannel 20' near its discharge end to catch-nuggets and slugs and to boil and level off the water, a tongue 20 aiding in this process.

The discharge launder 24 is similarly secured upon the apron l at the discharge end of the screen by means of bolts 25-26, and is adjustable to different levels to determine the thickness of the bed of sand on the screen.

Water is fed into the lower end of the hopper at 21 to pass through the screen in periodic impulses. I provide underneath the screen a distributing or directionalizing plate 30, which, in the form shown, is of spherical shape and is provided with a plurality of radial holes 3| intended to guide the surging water uniformly to all' parts of the screen area.

Underneath the four corners of the screen I provide short tubes 32 for guiding the water toward the corners. The plate under discussion also tends to settle the turbulence of the water. In a modified form the plate may be made flat with angular holes directing the water in the same manner.

The impulse chamber 35 is preferably mounted as a separate unit spaced from the hopper and may be mounted at any convenient place for serving one or more hoppers. It is here shown as supported on a side frame including a pair of legs 36 and horizontal frame members 31 anchored to the legs and the main frame.

The chamber has an intake 38, with an intake valve 39, and discharges into the hopper through a conduit 40, part of which may be flexible if defined to rectilinear, vertical movement by means of a guide channel 45 riding on two rollers 45' mounted on pins 41 secured in a fixed plate 48 (see Figures' i and 7).

The plunger is reciprocated by means of a rocking plate 50, which is pivotally supported on a pin 5| and has a slot 52 engaging over a pin 53 projecting from the plunger 44. As the plate is rocked, the walls of theslot 52 will impart a reciprocating motion to the pin 53 and the plunger.

Rocking motion is imparted to the plate 50' by means of a pitman 54 pivoted to the plate as at 55 and to a crank 56 as at 51, the crank being mounted on a shaft 58 which receives rotary motion from the power shaft 59 through a chain and sprocket drive 60.

The pin 5| is adjustably mounted in an arcuate slot 6| in a fixed plate 62 and the length of stroke of the plunger may be regulated by adjustment of the pin 5| in the slot 6|. It will be noted (see Figure 2) that the pin 5| may be readily adjusted in the slot while the machine is in operation. As an aid to the operator in making the proper adjustment, I provide one or more windows 6 in the walls of the hopper 4 so that the operator may watch the concentrates descending in the hopper while he is making the adjustment.

The stroke of the diaphragm determines to a great extent the character of the concentrates. The longer the stroke, the more coarse material will be carried off and the finer material will be the concentrates or the hutch product. The shorter the stroke, the less coarse material will go over and the more coarse material will be found in the concentrates.

The facility with which the stroke may be adjusted while the machine is in operation and while the descending concentrates are under observation, is of considerable advantage, since in prior devices a great deal of time is consumed in effecting proper adjustment .by the trial and error method.

In case it is desired to clean the hutch product over again, I providean auxiliary jig 55 which is built substantially along the same lines as the main jig,

.The auxiliary jig 65 comprises a hopper 65, a screen 61, a basket structure 18, a distributing plate 19, a feed launder 50 mounted to receive the hutch product from the main jig, as at 8| and a discharge launder 82.

The fine concentrates are discharged from th auxiliary jig through the spout 83, and the tail- 7 ing are fed back from the discharge launder to the main jig for further treatment in a closed circuit, through a conduit 84 having a pump 85 therein.

The auxiliary jig receives its impulses from the samev impulse chamber as used for the main jig, through a conduit 86, which has a delivery valve 8! with the adjusting screw 88 as previously described. An adjustable valve-89 is provided in the manifold 90 feeding two conduits 40 and SB't'o divert a desired amount of water into the auxiliary The legs 2 and 36 of the frame members are preferably provided with leveling screws 9| to compensate for slight-unevenness in the surface of the foundation.

' In operation, it will be noted that the machine is simple and easy to assemble, even by inexperienced help. Due to the basket construction, the underlying jig and impulse chamber may be arranged in any desired direction with respect to the natural flow of the material to suit conditions and the lay of the terrain.

The device may be readily set up with the impulse chamber to the right of the jig, as shown in Figure 2, or to the left, or underneath either launder, in front or in back of the jig.

The same impulse chamber may be used to feed the main jig and the auxiliary jig and any additional jigs, if desired.

The two launders may be adjusted with respect to the screen to control the speed of flow of material across the screen and the thickness of the bed upon the screen.

The length of stroke at the impulse chamber may be readily controlled while the machine is in operation and while the character of the descending concentrates is under observation. The impulse may be confined to upward impulses. If derired, alternate downward impulses may be added, and the intensity of the downward impulses may be controlled as compared with that of the upward impulses.

The impulses are evenly distributed over the screen area through the distributing plate, and nuggets and slugs are removed from the flowing material at the cross channel 20.

I claim:

1. In a jig construction of the character described, a main jig for classifying material passing therethrough and having a discharge spout for concentrates, an auxiliary jig having means for catching the concentrates and for re-classifying the same, means for feeding tailings from the second jig back to the first jig for further treat ment, and an impulse chamber having an outlet with branch connections for feeding both jigs, with a single proportioning valve in the outlet at the branch connection for distributing the feed of water to the two jigs in proportion to their requirements.

2. In a jig of the character described, a screen for receiving material thereon. a hopper underneath the screen, an impulse chamber having an intake valve connecting with a source of water and having a pipe communicating with the hopper, a delivery valve in the pipe conduit including a hinged member and a seat for the free end thereof, a reciprocating diaphragm in the wall of the chamber whereby water is forced through the pipe, hopper and screen in upward and downward impulses when the diaphragm is reciprocated, the delivery valve having a screw threaded through the seat for limiting closing action of the hinged member and seat when the screw is advanced, thereby controlling the downward impulses.

3. In a jig of the character described, a screen for receiving material thereon, a hopper underneath the screen, an impulse chamber having an intake valve connecting with a source of water and having a pipe communicating with the hopper, a delivery valve in the pipe conduit including a hinged member and a seat for the free end thereof, a reciprocating diaphragm in the wall of the chamber whereby water is forced through the I pipe, hopper and screen in upward and downward impulses when the diaphragm is reciprocated, the delivery valve having a screw threaded through the seat for limiting closing action of the hinged member and seat when th screw is advanced, thereby controlling the downward impulses, and the hopper having a window in one side thereof through which material descending from the screen may be observed.

4. In a jig of the character described, a screen for receiving material thereon, a hopper underneath the screen, an impulse chamber having an intake valve connecting with a source of water and having a pipe communicating with the hopper, a delivery valve in the pipe conduit including a hinged member and a seat for the free end thereof, a reciprocating diaphragm in the wall of the chamber whereby water is forced through the pipe, hopper and screen in upward and downward impulses when the diaphragm is reciprocated, the delivery valve having a screw threaded through the seat for limiting closing action of the hinged member and seat when the screw is advanced, thereby controlling the downward impulses, and the hopper having a window in one side thereof through which material descending from the screen may be observed, and the impulse chamber having control means for adjusting the intensity of the impulses operable while the jig is in operation and with the descending material under observation.

5. In a jig of the character described, a screen for receiving material thereon, a hopper underneath the screen, an impulse chamber having an intake valve connecting with a source of water and. having a pipe communicating with the hopper, a delivery valve in the pipe conduit including a hinged member and a seat for the free end thereof, a reciprocating diaphragm in the wall of the chamber whereby water is forced through the pipe, hopper and screen in upward and downward impulses when the diaphragm is reciprocated, the delivery valve having a screw threaded through the seat for limiting closing action of the hinged member and seat when the scr w is advanced, thereby controlling the downward impulses, and the hopper having a distributor plate arranged underneath the screen for distributing the impulses over the entire screen area.

COLE S. NAWMAN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 168,416 R'eily Oct. 5, 1875 189,528 Tyson Apr. 10, 1877 869,469 Wilson Oct. 29, 1907 901,475 Richards Oct. 20, 1908 955,329 Fowler Apr. 19, 1910 959,607 Richardson May 31, 1910 1,030,499 Wishart June 25, 1912 1,055,737 Gilbert Mar. 11, 1913 1,073,367 Shields Sept. 16, 1913 1,083,481 Bookwalter Jan. 6, 1914 1,095,817 Cory May 5, 1914 1,146,682 Amis July 13, 1915 1,173,465 Steel Feb. 19, 1916 1,400,910 Ransom Dec. 20, 1920 1,401,538 Kessler Dec. 27, 1921 1,789,516 Crangle Jan. 20, 1931 (Other references on following page) 7 UNITED STATES PATENTS Number Number Name Date 1,911,156 Laing May 23, 1933 1 2,027,597 Lide Jan. 14, 1936 2,046,901 Kirby July 7, 1935 5 2,052,431 Warde Aug. 25, 1936 fffg 2,129,795 Storsand Sept. 13, 193-8 278561 2,138,315 Vissac Nov. 29, 1933 2,169,544 Vissac Aug. 15, 1939 2,130,574 Wood Nov. 21, 1939 10 2,211,033 McDonald Aug. 13, 1940 2,242,020 Wood May 13, 1941 2,309,275 Remer Jan. 26, 1943 2,314,428 Schouten Mar. 23, 1943 Name Date Tocci-Gilbert Jan. 2, 1945 Macaulay Feb. 25, 1947 FOREIGN PATENTS Country Date Australia Apr. 15, 1930 Great Britain Oct. 13, 1927 OTHER REFERENCES Richards and. Locke, Textbook of Ore Dressing,

3rd edition, McGraw Hill, 1940,- page 196.

Taggart, Handbook of Mineral Dressing, Wiley, 1945, section II, pages-14, 15.

TextBo k fOreDr ih d, 03,11 1, Tuthill Aug. 31, 1943 15 1122 essmg RC M s 19 2 

